Internal Fiberglass Ferrules are either solid (S) or hollow filament wound epoxy tubes (T) and are inserted inside the ends of two tubes to connect them together. Internal ferrules make a smoother connection that does not have the bulk of an external ferrule. It is helpful to glue the ferrule into one tube.
The lengths of these ferrules may vary about +/- 1/2″.
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PLEASE NOTE: The FL-602 ferrules will only fit over .500″ BLACK fiberglass rods due to the nominal outer diameter being a bit smaller than .500″. In order to fit over a .500″ WHITE fiberglass rod, the rod will need to be sanded down.